It may be that the old astrologers had the truth exactly reversed, when they believed that the stars controlled the destinies of men. The time may come when men control the destinies of stars.
At the present rate of progress, it is almost impossible to imagine any technical feat that cannot be achieved - if it can be achieved at all - within the next few hundred years.
There is hopeful symbolism in the fact that flags do not wave in a vacuum.
A hundred years ago, the electric telegraph made possible - indeed, inevitable - the United States of America. The communications satellite will make equally inevitable a United Nations of Earth; let us hope that the transition period will not be equally bloody.
This last quote may disturb a few people. Just know that Clarke is not speaking in the New World Order sense of a United Nations of Earth. He just saw the potential of man and recognized the uniting factor that the new frontier of space might have for us. I find the hope and love that he had for humanity to be refreshing. Sadly he is gone.
Here is a last message.